Description
INA NKI85/26-XL Needle Roller Bearing 85x115x26mm Genuine
Authorized-Channel Sourcing — Every INA NKI85/26-XL needle roller bearing we quote ships with batch-level traceability documentation back to the manufacturer’s distribution records.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | INA NKI85/26-XL |
| Bearing Type | Needle Roller Bearing |
| Bore Diameter (Fw) | 85 mm |
| Outside Diameter (D) | 115 mm |
| Width (B) | 26 mm |
| Seal or Shield Type | Open |
| Load Direction | Radial |
| Style | With Inner Ring |
| Material | Bearing Steel |
| Weight | 0.75 kg |
The XL suffix designation is noted as unverified against the current manufacturer catalog and should be confirmed for internal design revision status before final specification.
Application Suitability
| Industry | Typical Applications |
|---|---|
| Industrial machinery | Gearbox intermediate shafts, conveyor drive rollers |
| Automotive and heavy vehicle repair | Transmission layshafts, steering column joints |
| Agricultural machinery | Combine harvester rotor drives, PTO shaft supports |
| Material handling | Forklift mast roller guides, overhead crane sheave axles |
Why a Needle Roller Cross-Reference Miss Can Seize a Gearbox
Swapping an INA NKI85/26-XL for a generic NKI 85/26 without verifying the internal geometry revision is a field failure waiting to happen.
A distributor once replaced a needle roller bearing on a crushing line gearbox with what looked like a dimensionally identical substitute. The outer envelope matched, the bore matched, the width matched. But the internal roller profile and load distribution differed. Within months the cage fractured under sustained radial load. This is not an isolated event — cross-reference errors that ignore internal design suffixes account for a significant share of premature field failures in heavy-drive applications [NEED_CITE: cross-reference errors as a leading cause of premature bearing failure in industrial gearboxes].
How the INA NKI85/26-XL Meets Heavy Radial Demands in Compact Envelopes
Needle roller bearings pack high radial load capacity into a low cross-section, which is exactly what transmission and gearbox designers need when shaft spacing is tight. The INA NKI85/26-XL delivers that compact rigidity at the 85 mm bore size, supporting sustained radial loads on intermediate shafts and drive rollers where deep groove ball bearings would require a far larger housing bore.
I once worked with a maintenance team that kept replacing a conventional ball bearing on a conveyor head pulley every few months. Switching to a needle roller configuration with the correct inner ring specification extended service intervals noticeably. The cross-brand interchange database we maintain helps engineers find equivalent replacements without guessing at internal geometry.
Radial Loads, Speed Limits, and Open-Type Lubrication Realities
This bearing operates under predominantly radial loading with minimal axial component. The 85×115×26 mm profile is suited to moderate-speed shafts where load density matters more than rotational velocity. Open-type construction means the rolling elements are exposed, which simplifies re-lubrication but also demands that the housing provide adequate sealing against contamination [NEED_CITE: open bearing contamination ingress and housing seal responsibility].
In dusty environments like mineral processing or agricultural harvesting, the external housing seal becomes the primary defense. Temperature swings in these settings affect lubricant viscosity and film thickness, so re-greasing intervals must reflect actual operating heat rather than generic catalog recommendations. Installation on a hardened shaft journal requires attention to the inner ring interference fit — too loose and the ring creeps, too tight and you compress the internal clearance below functional limits.
Bearing Steel, Open Cage Access, and Needle Geometry
The bearing steel construction provides the raceway hardness needed to resist indentation under heavy radial loads. Needle rollers have a high length-to-diameter ratio, distributing load across more contact area than cylindrical rollers of equivalent cross-section. This geometry is what allows the INA NKI85/26-XL to carry substantial loads despite its slim 26 mm width.
The open design allows maintenance technicians to visually inspect the rolling elements and raceway condition without disassembly of seals — a practical advantage during scheduled shutdowns. For applications where contamination is controlled, open bearings also reduce friction torque compared to sealed variants. The inner ring is integral to this configuration, meaning the shaft journal does not need to be hardened and ground to serve as a raceway, simplifying replacement on worn shafts.
What Happens When the Source Is Unreliable
A dimensionally correct counterfeit or a cross-referenced substitute that skips the suffix verification can fail without warning. Soft inner rings from unverified suppliers deform under load, accelerating roller skidding and cage wear. Premature failure on a critical drive shaft means unplanned downtime that costs far more than the bearing itself [NEED_CITE: unplanned downtime cost versus bearing replacement cost in heavy industry].
ISO 15243 classifies bearing failures into categories including fatigue, wear, corrosion, and electrical erosion. Many field failures attributed to "bad luck" trace back to selection mismatches or sourcing from channels that cannot verify origin. The correct bearing from a traceable supply chain protects against catastrophic damage to surrounding components and avoids warranty voidance on the equipment it serves.
How We Support Procurement Engineers on This Specification
Every INA NKI85/26-XL we source moves through authorized distributor channels with documentation that traces back to verifiable batch records. We do not ask buyers to trust markings on a box — we provide QR code verification pathways through Schaeffler’s official applications so authenticity can be confirmed independently.
Our cross-reference database does not stop at matching bore and outside diameter. When a buyer needs an interchange from NTN or IKO, we align cage material, internal clearance, and design revision suffixes alongside the dimensional envelope. Application-based selection guidance is available when operating conditions fall outside standard catalog parameters — unusual temperatures, combined loads, or vibration-prone installations. We also supply country-of-origin documentation for import compliance, which matters for buyers managing customs clearance across multiple jurisdictions.
Documentation & Authenticity
- Supplier Certificate of Conformity with batch and lot traceability linked to the INA NKI85/26-XL shipment
- QR code verification pathway via Schaeffler official apps for on-site authenticity confirmation of each unit
- Third-party pre-shipment dimensional inspection confirming bore, OD, and width tolerances before dispatch
- Material certificate verifying bearing steel grade and heat treatment condition for the inner ring and rolling elements
- Country-of-origin documentation prepared for import clearance and HS code classification support
- Batch traceability records retained for warranty or field-failure investigation purposes
Storage, Handling & Mounting
- Keep the INA NKI85/26-XL in its original sealed packaging until the moment of installation to protect the open-type rolling elements from moisture and particulate contamination
- Store at stable temperature away from direct sunlight to prevent condensation inside the packaging, which can initiate corrosion on the bearing steel raceways before the bearing ever reaches the shaft
- Wear clean lint-free gloves when handling the exposed needle rollers and cage assembly — fingerprints introduce acidic residues that etch raceway surfaces over time
- The inner ring should be installed with a controlled interference fit on the shaft journal using induction heating rather than forceful pressing to avoid brinelling the needle rollers against the outer ring
- After mounting, apply the specified grease or oil lubrication immediately since the open-type design offers no factory seal to protect dry surfaces during storage or transport
- For equipment operating in high-dust environments, verify that housing seals are intact and properly tensioned — the open bearing relies entirely on external sealing for contamination exclusion
Requesting a Quotation
Share your operating parameters — radial load, shaft speed, ambient temperature, and housing seal type — so we can confirm the INA NKI85/26-XL is the correct fit or identify a more suitable variant. If you are replacing an existing bearing, provide the OEM equipment number or the markings on the unit being replaced so we can run a full cross-reference check. Request the documentation package including origin certification and batch traceability if import compliance is a factor in your procurement process.
Frequently Asked Questions
Q: How can I verify that the INA NKI85/26-XL I receive is genuine?
A: Each bearing can be checked through Schaeffler’s official verification apps using the QR code on the packaging. We also supply a Certificate of Conformity with batch-level traceability and can arrange third-party pre-shipment inspection for buyers who require independent dimensional and material verification before the goods leave our facility.
Q: What should I check when cross-referencing this bearing to another brand?
A: Beyond matching the 85 mm bore, 115 mm OD, and 26 mm width, you need to confirm the internal cage design, clearance class, and any design-revision suffixes. A needle roller bearing with the same outer dimensions but a different roller profile or cage material may fit the housing but fail prematurely under the actual load spectrum. Our interchange database checks all of these parameters together.
Q: When should I choose a needle roller bearing with an inner ring versus without?
A: Bearings like the NKI series include an inner ring, which is necessary when the shaft journal is not hardened and ground to serve as a raceway. The NK series (without inner ring) requires the shaft itself to function as the inner race, demanding higher surface hardness and finish. If you are replacing a worn shaft that cannot be re-ground, the inner-ring version is the practical choice.
Q: What lubrication approach is recommended for this open-type needle roller bearing?
A: Open-type bearings require external lubrication applied through the housing. Grease is typical for moderate-speed applications, while oil circulation or oil mist suits higher-speed shafts. Re-lubrication intervals depend on operating temperature, load, and contamination levels rather than a fixed calendar schedule. We can help estimate intervals based on your specific duty cycle.
Q: What documentation comes with a bulk order?
A: Bulk shipments include the Certificate of Conformity, material certificates, dimensional inspection reports, batch and lot traceability records, and country-of-origin documentation. HS code information is provided for customs clearance. Pre-shipment inspection reports are available upon request for buyers who require independent verification before release.
Get the Right Bearing Verified Before It Ships
Submit your application parameters or OEM equipment number, and we will return a matched quotation with full documentation and lead-time confirmation.
